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Finding the Fourth Proportional to 7,383.20, 10,168.08 and 7,221.92

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Solution

The fourth proportional to 7,383.20, 10,168.08 and 7,221.92 is: 9,945.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,383.20 : 10,168.08 = 7,221.92 : x
  2. Step 2: Convert to fraction form
    7,383.20/10,168.08 = 7,221.92/x
  3. Step 3: Cross multiply
    7,383.20x = 10,168.08 × 7,221.92
  4. Step 4: Simplify right side
    7,383.20x = 73,433,060.31
  5. Step 5: Solve for x
    x = 73,433,060.31/7,383.20
  6. Step 6: Final answer
    x = 9,945.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.